US5199973A - Method of disposing of medical sharps - Google Patents
Method of disposing of medical sharps Download PDFInfo
- Publication number
- US5199973A US5199973A US07/891,933 US89193392A US5199973A US 5199973 A US5199973 A US 5199973A US 89193392 A US89193392 A US 89193392A US 5199973 A US5199973 A US 5199973A
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- United States
- Prior art keywords
- crucible
- aluminum
- waste metals
- placing
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 239000002699 waste material Substances 0.000 claims abstract description 32
- 150000002739 metals Chemical class 0.000 claims abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 239000002893 slag Substances 0.000 claims abstract description 11
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000004064 recycling Methods 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims abstract description 6
- 239000011819 refractory material Substances 0.000 claims abstract 4
- 238000007654 immersion Methods 0.000 claims abstract 2
- 229960005191 ferric oxide Drugs 0.000 claims 7
- 229940024548 aluminum oxide Drugs 0.000 claims 2
- 239000011810 insulating material Substances 0.000 claims 2
- 238000002844 melting Methods 0.000 claims 2
- 230000008018 melting Effects 0.000 claims 2
- 230000000977 initiatory effect Effects 0.000 abstract description 2
- 208000015181 infectious disease Diseases 0.000 description 10
- 230000002458 infectious effect Effects 0.000 description 8
- 239000002906 medical waste Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000010781 infectious medical waste Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000030507 AIDS Diseases 0.000 description 1
- 208000035473 Communicable disease Diseases 0.000 description 1
- 241000700721 Hepatitis B virus Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
- C22B7/003—Dry processes only remelting, e.g. of chips, borings, turnings; apparatus used therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
- A61B50/30—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments
- A61B50/36—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments for collecting or disposing of used articles
- A61B50/362—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments for collecting or disposing of used articles for sharps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/0075—Disposal of medical waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/25—Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix
- B09B3/29—Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix involving a melting or softening step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
- Y10S75/959—Thermit-type reaction of solid materials only to yield molten metal
Definitions
- This invention relates to a method of successfully disposing of or recycling metals and glass present in autoclave or incinerator and residue, treatment sludges, discarded batteries, medical "sharps", and other various products.
- the sharps in particular are rendered unrecognizable as potentially infectious biomedical waste and can be recycled.
- the treatment for the various types of waste and specifically for sharps is that they be treated by incineration, encapsulation, or other means by which they are rendered unrecognizable as potentially infectious biomedical waste or otherwise unusable.
- the regulations require certain types of packaging. For sharps, it is required that they be placed in a break-resistant, rigid, puncture-resistant container, the openings of which must be tightly closed prior to storage or transport.
- FIG. 1 is vertical, sectional view of the crucible, contained by a bed of sand, with a container of waste metals in its cavity.
- FIG. 2 is a view of FIG. 1 looking in the direction of arrows 2--2.
- FIG. 3 a sectional view of the crucible of FIG. 1 after the mixture of aluminum and metal oxide has been placed in the crucible and the hood has been placed over the crucible and partially immersed in sand.
- FIG. 4 is a view of FIG. 3 looking in the direction of arrows 4--4.
- FIG. 5 shows the metal ingot and slag resulting from the reaction.
- the method of this invention employs Thermit, which is a trademark for a mixture of aluminum powder and powdered iron oxide.
- Thermit is a trademark for a mixture of aluminum powder and powdered iron oxide.
- the superheated liquid metal produced by the reaction is estimated to reach up to 5,000° F. (2,760° C.).
- the reaction is completed in 30 seconds to two minutes regardless of the size of the charge.
- container 10 is placed in cavity 12 of crucible 14, as shown in FIG. 1.
- the container is made out of aluminum and it is contemplated that such aluminum containers will be provided to the hospitals, laboratories and other producers of waste metals so that the once used needles, scalpels, or other waste metals can be immediately deposited in the aluminum container. Periodically these containers will be gathered up and taken to crucible 14 where, in the case of sharps, they will be rendered unrecognizable as potentially infectious biomedical waste or otherwise unusable.
- the aluminum containers would meet the requirement of the regulations that the containers for sharps be break-resistant and puncture resistant. Also, by using aluminum containers, the aluminum is oxidized by the reaction along with the powdered aluminum in the Thermit material and, therefore, does not introduce any foreign substance into the resulting ingot and slag.
- container 10 filled with waste metals is placed in cavity 12 of crucible 14.
- cavity 12 is in the shape of an inverted cone, which is preferred because it will allow the resulting ingot and slag to be more readily removed from the cavity after the reaction is completed.
- Crucible 14 is contained in a bed of loose sand 24.
- the container is shown as being cylindrical.
- the Thermit mixture of powdered aluminum and iron oxide is placed in the crucible and is indicated by the number 16. Igniter 18, usually a thin ribbon of magnesium, extends into the Thermit mixture.
- the igniter produces sufficient heat to cause the aluminum in the mixture to begin to remove the oxygen from the iron oxide thereby initiating the exothermic reaction that produces aluminum oxide and iron and a lot of heat.
- the oxide/metal reaction provides its own oxygen supply and thus is virtually impossible to stop once the reaction has started.
- the temperature produced is 4,000°-5,000° F. which is sufficient to melt the stainless steel used in the sharps.
- the stainless steel joins the molten mass of iron produced to provide an ingot containing iron, chrome, and nickel from the iron oxide and the stainless steel Hood 26 is placed over crucible 14 and partially immersed in bed 24 of sand. The hood traps the heat and reaction products produced, thus eliminating air pollution.
- the metal settles to the bottom of the crucible and forms ingot 20.
- the aluminum oxide rises to the top of the molten metal and forms layer 22 of slag 22. Both of these products can be marketed. The iron, chrome, and nickel mixture can be recycled. The aluminum oxide or slag can be crushed and used in the manufacture of grinding wheels or any other application where an excellent abrasive is required. The intense heat produced by the reaction, of course, kills any viruses that may be associated with the sharps so the products produced can be reused safely.
- Any organic material included with the medical waste will, of course, be burned in the process.
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Surgery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Molecular Biology (AREA)
- Thermal Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Animal Behavior & Ethology (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Processing Of Solid Wastes (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
A method of successfully disposing of, or recycling, waste metals comprising placing the waste metals in an aluminum container, placing the container in a crucible containing a mixture of powdered aluminum and iron oxide, initiating a self-sustaining reaction between the oxide and the metal that oxidizes the aluminum and reduces the iron and heats the contents of the crucible to 4,000° F. or higher to melt the waste metals and the iron and produce an ingot of the iron and the metal from the sharps and aluminum oxide slag, and trapping the heat and reaction products above the crucible with a hood of refractory material which covers the crucible and is sealed by partial immersion in loosely packed sand. The hood enables complete containment and incineration of the reaction products. The ingot and the slag can be recycled.
Description
This application is a continuation-in-part of application Ser. No. 07/562,886, filed Aug. 6, 1990 entitled METHOD OF DISPOSING OF MEDICAL SHARPS, now abandoned.
This invention relates to a method of successfully disposing of or recycling metals and glass present in autoclave or incinerator and residue, treatment sludges, discarded batteries, medical "sharps", and other various products. The sharps in particular are rendered unrecognizable as potentially infectious biomedical waste and can be recycled.
In an article published in the February, 1988 issue of OMNI, Ellen Kunes in an article entitled "The Trashing of America" describes the problems being experienced at that time with what is now defined as "Potentially Infectious Biomedical Waste." In the article, she describes how children find boxes of used syringes in trash cans and play with them, thereby exposing themselves to infections and how hospital housekeeping staffs have the problem of being stuck by hypodermic needles that stick through plastic garbage bags. If any of these needles is contaminated, it could transmit to the person stuck an infectious disease, such as AIDS or the hepatitis B virus.
As a consequence, many states are passing laws that regulate the management of infectious waste, medical waste, and potentially infectious biomedical waste. The new regulations in Louisiana define potentially infectious biomedical waste, as including medical waste, infectious waste as defined herein and may be defined in other Louisiana law or code and waste considered likely to be infectious by virtue of what it is or how it may have been generated in the context of health care or health care-like activities. The regulation goes on to list what is included and one of the items is "sharps used or generated in health care or laboratory settings." Sharps are defined as needles, syringes, scalpels, scalpel blades, pipettes and other medical instruments capable of puncturing or lacerating skin. This definition also includes glass fragments and other health care and laboratory waste capable of puncturing or lacerating skin. The treatment for the various types of waste and specifically for sharps is that they be treated by incineration, encapsulation, or other means by which they are rendered unrecognizable as potentially infectious biomedical waste or otherwise unusable. The regulations require certain types of packaging. For sharps, it is required that they be placed in a break-resistant, rigid, puncture-resistant container, the openings of which must be tightly closed prior to storage or transport.
It is an object of this invention to provide a method of disposing of or recycling waste metals that is quick, effective, inexpensive, and non-polluting and that can be practiced by a hospital or any other producer of waste metal, in most cases, on its own grounds and that produces a valuable bi-product.
It is a further object of this invention to provide a method of disposing of or recycling waste material including potentially infectious riomedical waste such as sharps by exposing the waste metals to the heat produced by the exothermic reaction of aluminum and iron oxide in a reactor that will burn completely the non-metallic waste melt and sterilize the glass, and melt and sterilize the waste metals into a homogeneous body of low-grade steel that is covered by a slag layer of aluminum oxide. Both the steel and the slag can be into useful products.
These other objects, advantages, and features of this invention be apparent to those skilled in the art from a consider of this specification, including the attached drawings and appended claims.
FIG. 1 is vertical, sectional view of the crucible, contained by a bed of sand, with a container of waste metals in its cavity.
FIG. 2 is a view of FIG. 1 looking in the direction of arrows 2--2.
FIG. 3 a sectional view of the crucible of FIG. 1 after the mixture of aluminum and metal oxide has been placed in the crucible and the hood has been placed over the crucible and partially immersed in sand.
FIG. 4 is a view of FIG. 3 looking in the direction of arrows 4--4.
FIG. 5 shows the metal ingot and slag resulting from the reaction.
The method of this invention employs Thermit, which is a trademark for a mixture of aluminum powder and powdered iron oxide. When the mixture is caused to react, by strong heating, a great deal of heat evolves and aluminum oxide and a white hot molten mass of metallic iron are produced. The superheated liquid metal produced by the reaction is estimated to reach up to 5,000° F. (2,760° C.). The reaction is completed in 30 seconds to two minutes regardless of the size of the charge.
In accordance with this invention, container 10 is placed in cavity 12 of crucible 14, as shown in FIG. 1. Preferably the container is made out of aluminum and it is contemplated that such aluminum containers will be provided to the hospitals, laboratories and other producers of waste metals so that the once used needles, scalpels, or other waste metals can be immediately deposited in the aluminum container. Periodically these containers will be gathered up and taken to crucible 14 where, in the case of sharps, they will be rendered unrecognizable as potentially infectious biomedical waste or otherwise unusable. The aluminum containers would meet the requirement of the regulations that the containers for sharps be break-resistant and puncture resistant. Also, by using aluminum containers, the aluminum is oxidized by the reaction along with the powdered aluminum in the Thermit material and, therefore, does not introduce any foreign substance into the resulting ingot and slag.
In FIG. 1, container 10 filled with waste metals is placed in cavity 12 of crucible 14. In the embodiment shown, cavity 12 is in the shape of an inverted cone, which is preferred because it will allow the resulting ingot and slag to be more readily removed from the cavity after the reaction is completed. Crucible 14 is contained in a bed of loose sand 24. In FIG. 2, the container is shown as being cylindrical. In FIG. 3, the Thermit mixture of powdered aluminum and iron oxide is placed in the crucible and is indicated by the number 16. Igniter 18, usually a thin ribbon of magnesium, extends into the Thermit mixture. The igniter produces sufficient heat to cause the aluminum in the mixture to begin to remove the oxygen from the iron oxide thereby initiating the exothermic reaction that produces aluminum oxide and iron and a lot of heat. The oxide/metal reaction provides its own oxygen supply and thus is virtually impossible to stop once the reaction has started. The temperature produced is 4,000°-5,000° F. which is sufficient to melt the stainless steel used in the sharps. The stainless steel joins the molten mass of iron produced to provide an ingot containing iron, chrome, and nickel from the iron oxide and the stainless steel Hood 26 is placed over crucible 14 and partially immersed in bed 24 of sand. The hood traps the heat and reaction products produced, thus eliminating air pollution. The metal settles to the bottom of the crucible and forms ingot 20. The aluminum oxide rises to the top of the molten metal and forms layer 22 of slag 22. Both of these products can be marketed. The iron, chrome, and nickel mixture can be recycled. The aluminum oxide or slag can be crushed and used in the manufacture of grinding wheels or any other application where an excellent abrasive is required. The intense heat produced by the reaction, of course, kills any viruses that may be associated with the sharps so the products produced can be reused safely.
Any organic material included with the medical waste will, of course, be burned in the process.
From the foregoing it will be seen that this invention is one well adapted to attain all of the ends and objects hereinabove set forth, together with other advantages which are obvious and which are inherent to the method.
Claims (8)
1. A method of disposing of waste metals comprising placing the waste metals in a crucible of refractory material, placing a mixture of aluminum powder and iron oxide in the crucible, and igniting the mixture to produce an exothermic reaction that will raise the temperature of the waste metals above their melting point, reduce the iron oxide, and oxidize the aluminum.
2. The method of claim 1 in which the waste metals are collected in an aluminum container and the container containing the waste metals is placed in the reactor.
3. A method of disposing of waste metals comprising placing the waste metals in an aluminum container, placing the container in a crucible, placing a mixture of powdered aluminum and iron oxide in the crucible, and igniting the mixture to start an oxide/metal reaction that produces a temperature above 4,000° F. to melt the waste metals and the iron and produce an ingot of iron and aluminum-oxide slag.
4. A method of recycling waste metals comprising placing the waste metals in a crucible of refractory material, placing a mixture of aluminum powder and iron oxide in the crucible, igniting the mixture to produce an exothermic reaction that will raise the temperature of the waste metals above their melting point, reduce the iron oxide, and oxidize the aluminum, and trapping the heat and reaction products above the crucible enabling complete containment and incineration of the reaction products.
5. The method of claim 4 in which the waste metals are collected in an aluminum container and the container containing the waste metals is placed in the reactor.
6. The method of claim 4 in which the heat and reaction products are trapped by a hood of refractory material covering the crucible and sealed by partial immersion in an inert insulating material.
7. The method of claim 6 in which the inert insulating material is loosely packed sand.
8. A method of recycling waste metals comprising placing the waste metals in an aluminum container, placing the container in a crucible, placing a mixture of powdered aluminum and iron oxide in the crucible, igniting the mixture to start an oxide/metal reaction that produces a temperature above 4,000° F. to melt the waste metals and the iron and produce an ingot of iron and aluminum oxide slag, and trapping the heat and reaction products above the crucible enabling complete containment and incineration of the reaction products.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/891,933 US5199973A (en) | 1990-08-06 | 1992-06-01 | Method of disposing of medical sharps |
AU30706/92A AU3070692A (en) | 1992-06-01 | 1992-11-12 | A method of disposing of medical sharps |
PCT/US1992/009646 WO1993024251A1 (en) | 1992-06-01 | 1992-11-12 | A method of disposing of medical sharps |
CA 2084053 CA2084053A1 (en) | 1992-06-01 | 1992-11-27 | Method of disposing of medical sharps |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US56288690A | 1990-08-06 | 1990-08-06 | |
US07/891,933 US5199973A (en) | 1990-08-06 | 1992-06-01 | Method of disposing of medical sharps |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US56288690A Continuation-In-Part | 1990-08-06 | 1990-08-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US5199973A true US5199973A (en) | 1993-04-06 |
Family
ID=25399079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/891,933 Expired - Fee Related US5199973A (en) | 1990-08-06 | 1992-06-01 | Method of disposing of medical sharps |
Country Status (4)
Country | Link |
---|---|
US (1) | US5199973A (en) |
AU (1) | AU3070692A (en) |
CA (1) | CA2084053A1 (en) |
WO (1) | WO1993024251A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5294767A (en) * | 1991-01-31 | 1994-03-15 | Libo-Medical S.R.L. | Device for destroying hypodermic needles |
US5359947A (en) * | 1990-05-16 | 1994-11-01 | Wagner Anthony S | Equipment and process for waste pyrolysis and off gas oxidative treatment |
WO1995026253A1 (en) * | 1994-03-28 | 1995-10-05 | Retech, Inc. | Apparatus and method for starting a plasma arc treatment system |
AU669896B2 (en) * | 1992-06-17 | 1996-06-27 | Douglas Bean (Australia) Pty Ltd | Sharps container |
WO2002056926A1 (en) * | 2001-01-17 | 2002-07-25 | Hämosan Life Science Services Gmbh | Treatment of material infected with heat-resistant pathogens |
US20070061000A1 (en) * | 1995-09-18 | 2007-03-15 | Campbell Carey V | Balloon catheter device |
US20070208208A1 (en) * | 2001-09-25 | 2007-09-06 | Geosafe Corporation | Methods for melting of materials to be treated |
US20080102413A1 (en) * | 2005-01-28 | 2008-05-01 | Thompson Leo E | Thermally Insulating Liner for In-Container Vitrification |
US10321968B2 (en) | 2015-10-23 | 2019-06-18 | Medline Industries, Inc. | Sharps container |
CN111717567A (en) * | 2020-05-27 | 2020-09-29 | 安徽科创生产力促进中心有限公司 | Wax seal collection device of medical waste |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US2369112A (en) * | 1941-04-03 | 1945-02-06 | Adeline Pierre | Manufacture of metals and alloys |
US2370610A (en) * | 1941-04-01 | 1945-02-27 | Thermoloys Ltd | Manufacture of ferromanganese |
US4842138A (en) * | 1986-03-10 | 1989-06-27 | Devon Industries, Inc. | Rigid disposable container for holding and dispensing of used medical sharps and other medical-surgical materials |
US5005496A (en) * | 1988-07-07 | 1991-04-09 | Kyoei Steel Ltd. | Method for disposal of medical waste materials |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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GB581888A (en) * | 1941-11-14 | 1946-10-29 | Pierre Adeline | Improvements in the production of steel and alloys |
GB994395A (en) * | 1962-05-30 | 1965-06-10 | William Vigors Hewitt | A process for melting ferrous scrap by exothermic reaction |
GB1007065A (en) * | 1963-10-08 | 1965-10-13 | Kemwell A G | Method and apparatus for melting metals |
GB1395970A (en) * | 1972-11-17 | 1975-05-29 | Horner W F Thompson D W | Refining |
FR2479250A1 (en) * | 1980-02-08 | 1981-10-02 | Deardorff Paul | Fuel compsn. contg. iron oxide - in form of by=product waste obtd. in steel prodn. and a metallic reducer |
US4917726A (en) * | 1987-04-16 | 1990-04-17 | Amax Inc. | Chromium recovery process |
ES2050790T3 (en) * | 1988-02-12 | 1994-06-01 | Cundell Decorprint Ltd | CONTAINER. |
-
1992
- 1992-06-01 US US07/891,933 patent/US5199973A/en not_active Expired - Fee Related
- 1992-11-12 WO PCT/US1992/009646 patent/WO1993024251A1/en active Application Filing
- 1992-11-12 AU AU30706/92A patent/AU3070692A/en not_active Abandoned
- 1992-11-27 CA CA 2084053 patent/CA2084053A1/en not_active Abandoned
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Cited By (15)
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US5359947A (en) * | 1990-05-16 | 1994-11-01 | Wagner Anthony S | Equipment and process for waste pyrolysis and off gas oxidative treatment |
US5294767A (en) * | 1991-01-31 | 1994-03-15 | Libo-Medical S.R.L. | Device for destroying hypodermic needles |
AU669896B2 (en) * | 1992-06-17 | 1996-06-27 | Douglas Bean (Australia) Pty Ltd | Sharps container |
WO1995026253A1 (en) * | 1994-03-28 | 1995-10-05 | Retech, Inc. | Apparatus and method for starting a plasma arc treatment system |
US5528012A (en) * | 1994-03-28 | 1996-06-18 | Retech, Inc. | Apparatus and method for starting a plasma arc treatment system |
US20070061000A1 (en) * | 1995-09-18 | 2007-03-15 | Campbell Carey V | Balloon catheter device |
WO2002056926A1 (en) * | 2001-01-17 | 2002-07-25 | Hämosan Life Science Services Gmbh | Treatment of material infected with heat-resistant pathogens |
US20070208208A1 (en) * | 2001-09-25 | 2007-09-06 | Geosafe Corporation | Methods for melting of materials to be treated |
US7429239B2 (en) * | 2001-09-25 | 2008-09-30 | Geosafe Corporation | Methods for melting of materials to be treated |
US20080102413A1 (en) * | 2005-01-28 | 2008-05-01 | Thompson Leo E | Thermally Insulating Liner for In-Container Vitrification |
US20080128271A1 (en) * | 2005-01-28 | 2008-06-05 | Geosafe Corporation | Apparatus for Rapid Startup During In-Container Vitrification |
US20080167175A1 (en) * | 2005-01-28 | 2008-07-10 | Lowery Patrick S | Refractory Melt Barrier For In-Container Vitrification |
US10321968B2 (en) | 2015-10-23 | 2019-06-18 | Medline Industries, Inc. | Sharps container |
US11559369B2 (en) | 2015-10-23 | 2023-01-24 | Medline Industries, Lp | Sharps container |
CN111717567A (en) * | 2020-05-27 | 2020-09-29 | 安徽科创生产力促进中心有限公司 | Wax seal collection device of medical waste |
Also Published As
Publication number | Publication date |
---|---|
WO1993024251A1 (en) | 1993-12-09 |
AU3070692A (en) | 1993-12-30 |
CA2084053A1 (en) | 1993-12-02 |
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